Friction draft-rigging for railway-cars.



v J. P. OGONNOR.

FRICTION DRAFT RIGGING FOR RAILWAY CARS.

APPLICATION FILED JULY 28, 1909.

Patented Aug. 2, 1910.

2 SHEETS-SHEET 1.

Ill

A Q )U I J. P. OUONNOR.

FRIGTION DRAFT EIGGING FOR RAILWAY (JARS.

APPLICATION I ILED JULY 28, 1909.

. Patented Aug. 2, 1910.

I 2 sums-511211 12,

UNITED STATES PATENT OFFICE.

JOHN F. OCONNOR, OF CHICAGO, TLLI NOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

WILLIAM H. MINER, OF CHICAGO, ILLINOIS.

FRICTION DRAFT-RIGGING FOR RAILWAY-CARS.

Specification 'o Letters Patent. Application filed July 25, 1909. I Serial No. 510,075.

Patented 2, 1910.

h To all whom it may concern:

Be it known that I, JOHN F. OCoNNoR, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Friction Draft-Rigging for Railway-Cars, of which-the following is a specification.

My invention relates to nnprovements 1n friction draft rigging for railway cars.

Heretofore in friction draft rigging of the i kind to which my invention particularly relates, and wherein a longitudinally arranged spring reacts at one end a ainst a longitudinally. movable friction shel and at the 'other end a ainst segmental frict on shoes within the riction shell, the shoes being spread apart by a wedge w1th antl-frlction rollers interposed between the wedge and .the friction shoes, sometimes the grip-j like pressure of the spring against the end,

consists in the means I employ as herein shown and described and particularly specitied in the claims .to practically accomplish this object or result. I

It further consists in the novel construction of parts and devices and in the novel combinations ofparts and devices herein shown and described.

In the accompanying drawing forming *a part of this specification, Fi re 1 is a side elevation, partly in longitudinal section,'o-f

T a friction draft rigging embodying my invention. Fig. 2 1s a cross section on line 22 of Fig. 1. Fig. 3 is a detail front elevation of the friction shell, friction shoes and wedge. Fig. 4 is a detail cross section of the friction shell showing the rear ends of the friction shoes in elevation, the washer interposed between the sprin and friction shoes being removed. Fig. 5 1s a detail end view of the washer which is interposed be-- tween the friction shoes and the adjacent ends of the springs. Fig. 6 is a detail elevation of one of the friction shoes showing adjacent parts .the draft yoke, C the draft lugs or stop Wedge face theinner side thereof. Fig. 7 is a plan View partly in horizontal section. I Fig. 8 is a detail rear end viewof the friction shell and and Fig. 9 is a plan view of the wedge. Y In the drawing, A represents the draft sills or members of thecar frame to which the draft rigging is applied, the same being preferably center sills, B the drawbar, B

members secured ,to the draft s1lls, D D front and rear followers and E E the springs. r

F 'is a. longitudinally movable friction shell interposed between the followers and havingan internal cylindric friction facej'.

G are segmental friction shoes, preferably three in number, each having an external friction face g in sliding frictional engage ment with the internal friction face of the shell 'F, and each having an inclined or fg parallel to and coiiperating with one o the inclined faces 72, of the Wedge H, which. is preferably three-faced or Ipyramidal.

1 are anti-friction rollers interposed between the inclined or wedgin faces of the friction shoes G and wedge the rollers corresponding in number to the friction shoes. The friction shoes Gr each have a seat or shoulder g to keep the rollers in place and the wedge H is provided with cooperatin shoulders 72." and theshoes also have shou ders g to keep the rollers in place len thwise.

T e segmental friction'shoes G are preferably each an oblique segment of a cylinder so that their parallel meeting edges g 9 extend' at .an-angle instead of parallel to the axis of the cylinder. This prevents unevenness of wear of the friction shell at the meeting edges of the segments as the segments reciprocate longitudinally in the friction shel To prevent any gripping or binding tendency between the inner ends of the friction shoes and the adjacent ends of the springs and consequent failure of the inner ends of the friction shoes when acted upon by the wedge and rollers to properly spread outward against the frict onoshellflinterpose between the inner endsiof thefrietion shoes and the sprin s a naaslier G and provide the I same gwijit; 151111 flaring cylindrically curved faces g "'which bear against corresponding blmitly flaring cylindricaIIy curved faces g? with which the friction shoes the pressure of the springs against the shoes to prevent the inner ends of the shoes from properly spreading or moving outward under action of the wedge H and'rollers H The cotlperating bluntly flaring faces of the friction shoes and Washer are preferably each a segment of a cylinder instead of a conical sggment inorder to secure continued even bearing of the Washer against the shoe as the shoes spread or move radially outward under action of the Wedge H and rollers H The interposed Washer G is preferably furnished with a central triangularly curved hollow boss g adapted to enter and fit in a correspondingly shaped opening formed by the inner shoulders or flanges g of the friction shoes G.

In my invention as the contacting inclined faces of the friction shoes G and interposed washer G are very bluntly flaring and as the bearin of the Washer against the friction shoes 18 directly at the extreme ends of the shoes, the pressure of the washer against the friction shoes when the springs are compressed will have no injurious effect in the subsequent release action of the draft rig-' ging owing to the"blunt flare of the Washer and because the anti-friction rollers interposed between the Wedge and friction shoes and acting against the middle portion of the friction shoes effectually overcomes any sticking tendency ofthe friction members when the pressure of the draw-bar against the yvedge is relieved; while at the same time the ermtward pressure of the interposed g move outward during finisher-G against the inner ends of the friction shoes is suflicient to overcome the gripping action of the springs against the inner ends of the shoes and any consequent failure of the. inner ends of the-shoes to' properly the (30111 ressing or of the dra' t rigging.

cushioning movement rod which serves to K is' the conne'ctin hold all the parts asse bled and the springs under an initial tension h d h or compression. Its ea :1

preferably bears against the wedge spring reacting ,tion shell and at the other end against the' H and its nut K against the removable head plate f of the friction shell F. The fric tion shell F also has a supplemental removable plate f at its end, which serves as a centering boss for the larger spring and spring bears.

M is the removable tie-plate or guide which supports the draft rigging and is removably secured to the draft sills by bolts m.

1. In a friction draft rigging, the combination with a friction shell, of friction shoes within the shell, a wedge and anti-friction rollers acting centrally against the friction shoes, a spring reacting atone end against the friction shell and at the other end against the friction shoes, and a bevel faced washer interposed between the adjacent ends of the spring and friction shoes and acting only against the extreme ends of said shoes to prevent the pressure of thes'prinm from ins against which theouter end of the smaller ment 0 the inner'ends of the shoes, substantially as Specified.

2. In a friction draft rigging, the combi' nation with a friction shell, ofoblique Seg mental friction shoes within theshell, having their parallel edges extending at an angle wedge acting, pri e-"6 to the axis of the shell, a against the friction shoes, and a acting at. one end against the friction-shell:

and at theother end against shoes, substantially asspecified.

3. Ina friction draft rigging, the tbmbination with a friction shell, of friction shoes within the shell, a wedge and anti-friction I rollers acting against the friction shoes, a;

at one endagainst the fricfriction shoes, anda bevel faced washer interposed bet-ween the adjacentends of the spring and friction sho'es, said segmental ,friction shoes having bevel faces, the bevel faces of said friction shoes and said washer being each an inclined se ment of a cylinder, substantially as specified.

JOHN F. OOQNNOR.

Witnesses: V,

EDMUND Anooon, H. M. MUNDAY. 

